/**
 *  Version 2.4.0 Copyright (C) 2013
 *  Tested in IE 11, FF 28.0 and Chrome 33.0.1750.154
 *  No official support for other browsers, but will TRY to accommodate challenges in other browsers.
 *  Example:
 *      Print Button: <div id="print_button">Print</div>
 *      Print Area  : <div class="PrintArea" id="MyId" class="MyClass"> ... html ... </div>
 *      Javascript  : <script>
 *                       $("div#print_button").click(function(){
 *                           $("div.PrintArea").printArea( [OPTIONS] );
 *                       });
 *                     </script>
 *  options are passed as json (example: {mode: "popup", popClose: false})
 *
 *  {OPTIONS}   | [type]     | (default), values      | Explanation
 *  ---------   | ---------  | ---------------------- | -----------
 *  @mode       | [string]   | (iframe),popup         | printable window is either iframe or browser popup
 *  @popHt      | [number]   | (500)                  | popup window height
 *  @popWd      | [number]   | (400)                  | popup window width
 *  @popX       | [number]   | (500)                  | popup window screen X position
 *  @popY       | [number]   | (500)                  | popup window screen Y position
 *  @popTitle   | [string]   | ('')                   | popup window title element
 *  @popClose   | [boolean]  | (false),true           | popup window close after printing
 *  @extraCss   | [string]   | ('')                   | comma separated list of extra css to include
 *  @retainAttr | [string[]] | ["id","class","style"] | string array of attributes to retain for the containment area. (ie: id, style, class)
 *  @standard   | [string]   | strict, loose, (html5) | Only for popup. For html 4.01, strict or loose document standard, or html 5 standard
 *  @extraHead  | [string]   | ('')                   | comma separated list of extra elements to be appended to the head tag
 */
(function($) {
  var counter = 0;
  var modes = { iframe : "iframe", popup : "popup" };
  var standards = { strict : "strict", loose : "loose", html5 : "html5" };
  var defaults = { mode       : modes.iframe,
                   standard   : standards.html5,
                   popHt      : 500,
                   popWd      : 400,
                   popX       : 200,
                   popY       : 200,
                   popTitle   : '',
                   popClose   : false,
                   extraCss   : '',
                   extraHead  : '',
                   retainAttr : ["id","class","style"] };

  var settings = {};//global settings

  $.fn.printArea = function( options )
  {
      $.extend( settings, defaults, options );

      counter++;
      var idPrefix = "printArea_";
      $( "[id^=" + idPrefix + "]" ).remove();

      settings.id = idPrefix + counter;

      var $printSource = $(this);

      var PrintAreaWindow = PrintArea.getPrintWindow();

      PrintArea.write( PrintAreaWindow.doc, $printSource );

      setTimeout( function () { PrintArea.print( PrintAreaWindow ); }, 1000 );
  };

  var PrintArea = {
      print : function( PAWindow ) {
          var paWindow = PAWindow.win;

          $(PAWindow.doc).ready(function(){
              paWindow.focus();
              paWindow.print();

              if ( settings.mode == modes.popup && settings.popClose )
                  setTimeout(function() { paWindow.close(); }, 2000);
          });
      },
      write : function ( PADocument, $ele ) {
          PADocument.open();
          PADocument.write( PrintArea.docType() + "<html>" + PrintArea.getHead() + PrintArea.getBody( $ele ) + "</html>" );
          PADocument.close();
      },
      docType : function() {
          if ( settings.mode == modes.iframe ) return "";

          if ( settings.standard == standards.html5 ) return "<!DOCTYPE html>";

          var transitional = settings.standard == standards.loose ? " Transitional" : "";
          var dtd = settings.standard == standards.loose ? "loose" : "strict";

          return '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01' + transitional + '//EN" "http://www.w3.org/TR/html4/' + dtd +  '.dtd">';
      },
      getHead : function() {
          var extraHead = "";
          var links = "";

          if ( settings.extraHead ) settings.extraHead.replace( /([^,]+)/g, function(m){ extraHead += m });

          $(document).find("link")
              .filter(function(){ // Requirement: <link> element MUST have rel="stylesheet" to be considered in print document
                      var relAttr = $(this).attr("rel");
                      return ($.type(relAttr) === 'undefined') == false && relAttr.toLowerCase() == 'stylesheet';
                  })
              .filter(function(){ // Include if media is undefined, empty, print or all
                      var mediaAttr = $(this).attr("media");
                      return $.type(mediaAttr) === 'undefined' || mediaAttr == "" || mediaAttr.toLowerCase() == 'print' || mediaAttr.toLowerCase() == 'all'
                  })
              .each(function(){
                      links += '<link type="text/css" rel="stylesheet" href="' + $(this).attr("href") + '" >';
                  });
          if ( settings.extraCss ) settings.extraCss.replace( /([^,\s]+)/g, function(m){ links += '<link type="text/css" rel="stylesheet" href="' + m + '">' });

          return "<head><title>" + settings.popTitle + "</title>" + extraHead + links + "</head>";
      },
      getBody : function ( elements ) {
          var htm = "";
          var attrs = settings.retainAttr;
          elements.each(function() {
              var ele = PrintArea.getFormData( $(this) );

              var attributes = ""
              for ( var x = 0; x < attrs.length; x++ )
              {
                  var eleAttr = $(ele).attr( attrs[x] );
                  if ( eleAttr ) attributes += (attributes.length > 0 ? " ":"") + attrs[x] + "='" + eleAttr + "'";
              }

              htm += '<div ' + attributes + '>' + $(ele).html() + '</div>';
          });

          return "<body>" + htm + "</body>";
      },
      getFormData : function ( ele ) {
          var copy = ele.clone();
          var copiedInputs = $("input,select,textarea", copy);
          $("input,select,textarea", ele).each(function( i ){
              var typeInput = $(this).attr("type");
              if ($.type(typeInput) === 'undefined') typeInput = $(this).is("select") ? "select" : $(this).is("textarea") ? "textarea" : "";
              var copiedInput = copiedInputs.eq( i );

              if ( typeInput == "radio" || typeInput == "checkbox" ) copiedInput.attr( "checked", $(this).is(":checked") );
              else if ( typeInput == "text" ) copiedInput.attr( "value", $(this).val() );
              else if ( typeInput == "select" )
                  $(this).find( "option" ).each( function( i ) {
                      if ( $(this).is(":selected") ) $("option", copiedInput).eq( i ).attr( "selected", true );
                  });
              else if ( typeInput == "textarea" ) copiedInput.text( $(this).val() );
          });
          return copy;
      },
      getPrintWindow : function () {
          switch ( settings.mode )
          {
              case modes.iframe :
                  var f = new PrintArea.Iframe();
                  return { win : f.contentWindow || f, doc : f.doc };
              case modes.popup :
                  var p = new PrintArea.Popup();
                  return { win : p, doc : p.doc };
          }
      },
      Iframe : function () {
          var frameId = settings.id;
          var iframeStyle = 'border:0;position:absolute;width:0px;height:0px;right:0px;top:0px;';
          var iframe;

          try
          {
              iframe = document.createElement('iframe');
              document.body.appendChild(iframe);
              $(iframe).attr({ style: iframeStyle, id: frameId, src: "#" + new Date().getTime() });
              iframe.doc = null;
              iframe.doc = iframe.contentDocument ? iframe.contentDocument : ( iframe.contentWindow ? iframe.contentWindow.document : iframe.document);
          }
          catch( e ) { throw e + ". iframes may not be supported in this browser."; }

          if ( iframe.doc == null ) throw "Cannot find document.";

          return iframe;
      },
      Popup : function () {
          var windowAttr = "location=yes,statusbar=no,directories=no,menubar=no,titlebar=no,toolbar=no,dependent=no";
          windowAttr += ",width=" + settings.popWd + ",height=" + settings.popHt;
          windowAttr += ",resizable=yes,screenX=" + settings.popX + ",screenY=" + settings.popY + ",personalbar=no,scrollbars=yes";

          var newWin = window.open( "", "_blank",  windowAttr );

          newWin.doc = newWin.document;

          return newWin;
      }
  };
})(jQuery);